<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
<!--      添加角色按钮区-->
      <el-row>
        <el-col>
          <el-button type="primary">添加角色</el-button>
        </el-col>
      </el-row>

<!--      角色列表区-->
      <el-table :data="rolesList" border stripe>
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row :class="['bdbottom',i1 === 0 ? 'bdtop':'','vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
<!--              渲染一级权限-->
              <el-col :span="5">
                <el-tag closable @close="removeRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
<!--              渲染二级权限-->
              <el-col :span="19">
<!--                通过for循环 嵌套二级权限-->
                <el-row :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                  <el-col :span="6">
                    <el-tag type="success" closable @close="removeRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <el-col :span="18">
                    <el-tag type="warning" v-for="(item3,i3) in item2.children" :key="item3.id" closable @close="removeRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>
<!--        索引列-->
        <el-table-column type="index" label="#" ></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini">删除</el-button>
            <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>

<!--分配权限-->
    <el-dialog
            title="分配权限"
            :visible.sync="setRightDialogVisible"
            width="50%"
            @close="setRightDialogClosed"
    >
<!--      树形控件-->
      <el-tree ref="treeRef" :data="rightList" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys"></el-tree>
      <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
    </el-dialog>
  </div>
</template>

<script>
  export default {
    name: "Roles",
    data(){
      return{
      //  所有角色的列表数据
        rolesList:[],
        setRightDialogVisible:false,
        rightList:[],
        //树形控件的绑定对象
        treeProps:{
          label:'authName',
          children:'children'
        },
        //默认选中的节点id值数组
        defKeys:[],
        //当前即将分配的权限的角色id
        roleId:''
      }
    },
    created() {
      this.getRolesList()
    },
    methods:{
      async getRolesList(){
        const {data:res} = await this.$http.get('roles')
        if(res.meta.status !== 200) return this.$message.error('获取角色列表失败')
        this.rolesList = res.data
        console.log(this.rolesList)
      },
      //根据id删除权限
      async removeRightById(role,rightId){
      //  弹框提示用户是否删除
        const confirmResult = await this.$confirm('此操作将永久删除, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
        if(confirmResult !== 'confirm') return this.$message.info('取消了删除')
        const {data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if(res.meta.status !== 200) return this.$message.error('删除权限失败')
        role.children = res.data
      },
      //展示分配权限的对话框
      async showSetRightDialog(role){
        this.roleId = role.id
        //获取所有的权限数据
        const {data:res} = await this.$http.get('rights/tree')
        if(res.meta.status !== 200) return this.$message.error('获取所有权限数据失败！')
        //获取到权限数据保存在rightList
        this.rightList = res.data
        this.getLeafKeys(role,this.defKeys)
        this.setRightDialogVisible = true;
      },
      //通过递归的形式获得角色三级权限
      getLeafKeys(node,arr){
        //如果当前节点不包含children属性，则是三级节点
        if(!node.children) return arr.push(node.id)

        node.children.forEach(item => this.getLeafKeys(item,arr))
      },
      //监听分配权限对话框的关闭事件
      setRightDialogClosed(){
        this.defKeys = []
      },
      async allotRights(){
        const keys = [
            ...this.$refs.treeRef.getCheckedKeys(),
            ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
        const idStr = keys.join(',')
        const {data:res} = await this.$http.post(`roles/${this.roleId}/rights`,{rids:idStr})
        if(res.meta.status !== 200) return this.$message.error('分配权限失败')
        this.$message.success('分配用户权限成功！！')
        this.getRolesList()
        this.setRightDialogVisible = false
      }
    }
  }
</script>

<style lang="less" scoped>
.el-tag{
  margin: 7px;
}
  .bdtop{
    border-top:1px solid #eee;
  }
  .bdbottom{

    border-bottom: 1px solid #eee;
  }
  .vcenter{
    display: flex;
    align-items: center;
  }
</style>